﻿/*
 * MIT License
 *
 * Copyright (c) 2018 Clark Yang
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of 
 * this software and associated documentation files (the "Software"), to deal in 
 * the Software without restriction, including without limitation the rights to 
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies 
 * of the Software, and to permit persons to whom the Software is furnished to do so, 
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all 
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 
 * SOFTWARE.
 */

using Loxodon.Framework.Contexts;
using Loxodon.Framework.Interactivity;
using System;
using System.Threading.Tasks;
using Loxodon.Framework.Asynchronous;

namespace Loxodon.Framework.Views.InteractionActions
{
    public abstract class AsyncLoadableInteractionActionBase<TNotification> : AsyncInteractionActionBase<TNotification>
    {
        private string viewName;
        private IUIViewLocator locator;
        private IWindowManager windowManager;

        public AsyncLoadableInteractionActionBase(string viewName, IUIViewLocator locator) : this(viewName, locator, null)
        {
        }

        public AsyncLoadableInteractionActionBase(string viewName, IWindowManager windowManager) : this(viewName, null, windowManager)
        {
        }

        public AsyncLoadableInteractionActionBase(string viewName, IUIViewLocator locator, IWindowManager windowManager)
        {
            this.viewName = viewName;
            this.locator = locator;
            this.windowManager = windowManager;
        }

        protected string ViewName { get { return this.viewName; } }

        protected IUIViewLocator Locator
        {
            get
            {
                if (locator == null)
                {
                    ApplicationContext context = Context.GetApplicationContext();
                    locator = context.GetService<IUIViewLocator>();
                }
                return this.locator;
            }
        }

        protected async Task<T> LoadViewAsync<T>() where T : IView
        {
            var locator = this.Locator;
            if (locator == null)
                throw new NotFoundException("Not found the \"IUIViewLocator\".");

            if (string.IsNullOrEmpty(viewName))
                throw new ArgumentNullException("The view name is null.");

            return await locator.LoadViewAsync<T>(viewName);
        }

        protected async Task<T> LoadWindowAsync<T>() where T : IWindow
        {
            var locator = this.Locator;
            if (locator == null)
                throw new NotFoundException("Not found the \"IUIViewLocator\".");

            if (string.IsNullOrEmpty(viewName))
                throw new ArgumentNullException("The view name is null.");

            return await locator.LoadWindowAsync<T>(windowManager, viewName);
        }
    }
}
